{
  "manageEntity": {
    "action": "Save",
    "entityId": "877578610",
    "entityType": "Track",
    "nonce": "0x545e72da7dfc9c4ec8e680bc17b3ca66ce85507c224e5a9755eff880db277464",
    "signature": "0x57054c9a4026c1ba71b850619b564279bec0eaaa53a51d2ebcd557a357098d0a5a250bfe6b7d5d47ae1d10d091916c6e7b0263611856ae6be661c565c9b7f7491b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}