{
  "manageEntity": {
    "action": "Save",
    "entityId": "819600942",
    "entityType": "Track",
    "nonce": "0x05bd702c38066446c3bb11b0fb6b8950a85d96176812cd13e54f52cc9cb62287",
    "signature": "0xf6e9ccec7fdc22329057ed4396c4902b3ff5606986358b9a01102a1e8cc889af5f1a3318fc640e9345a0197b46ad067bb20f8f20393f957aba8207e72a46c7981c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}