{
  "manageEntity": {
    "action": "Save",
    "entityId": "906212431",
    "entityType": "Track",
    "nonce": "0xdaaf9d12e55e17e2045b52d9c6d69244f59750530ac59c1f7662bf51b8e67e66",
    "signature": "0x86b675775358baef385b46bd8d4d0cfab33f534f732b10c326d88966f30d096a09666c1f1e3bd8572408035959e7b20d85929dfb3c32f768e8fd0f24315160651c",
    "signer": "0x8F8C9b3BcE42B04f072D7Bd2093c3ad5E26De738",
    "userId": "967470359"
  }
}