{
  "manageEntity": {
    "action": "Save",
    "entityId": "564764",
    "entityType": "Track",
    "nonce": "0xdb4634e6f91bfc2b8ae0ee7be6f954cb461a8596762dae06303ee3e2d5e81d89",
    "signature": "0x4735243eb3724bbd960d01788d615ecee78a9578dae27a085f9b4b13a78160893aad206e86112fea772f33325a0938c0194584ea94903f04d994d1c07eb03c2e1b",
    "signer": "0xA9012b628a5Bed1406f97647fc6Be02eC3BF75b1",
    "userId": "141875639"
  }
}