{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588244267",
    "entityType": "Track",
    "nonce": "0xdce241a0b1eb8581d0cc656dc7e0fe76e22f678b2723070b6f2ab8e7eb1b8a08",
    "signature": "0x47f7d24b4d7a7089926843619b12a79e9c151353401d13c4090ad10d9325ebf00f1addf49b7266d5e61bf05e2d1bb66c3a160a5bfc0f28b08419861e052d9ebc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}