{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075694",
    "entityType": "Track",
    "nonce": "0x4e7d328d6ef92fcb9c621aac0e614adc7a980ce03d91bef89d9949db709d5ce5",
    "signature": "0x51bb17f8bca1c1e4c15dfb43e7068946de8e8cca5dfea0c77a0ff9268537d9f94b7d45834cbbbe60398f7561e29bcf48591e8b9afb74b739e1a0376ecd2f18381c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}