{
  "manageEntity": {
    "action": "Save",
    "entityId": "303116767",
    "entityType": "Track",
    "nonce": "0x92ff07b22836514d2f244eee21cbc1bb41811b5e69d359465c730efc0384d0df",
    "signature": "0xc7cdadb2b2e3f6e26a545e27219a09040ce039e1eef5e9dc7b22e3904259ebd651d734132ee268c31aa9e4d26bb3bebd2c854f91687c09d4931f40603a17df681b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}