{
  "manageEntity": {
    "action": "Save",
    "entityId": "732883020",
    "entityType": "Track",
    "nonce": "0x8e878ad25a18c7495a9c4f5917a4d1eea01589d53020459e8a116885e70b88d9",
    "signature": "0xa9a0f626308c0e1c09e3fad73899382d836341247691b4c5b802f027904db23c60da0dd65d9281723996ab75eeb012d36cc2d7777bbb44eca7c0e7fd2b13f9421b",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}