{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987363266",
    "entityType": "Track",
    "nonce": "0x97999d74da5af94042da269afcd159c4ef96ecaf1a551063e8c9c2e0aa9e3765",
    "signature": "0x35f9a561ff197e4601a53dc0d3d2e10c64a229535acf4fda79355bb40a364b7d5481c41af0b7729273012a1b84f728ff50b789500426e639014b89646019cd551c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}