{
  "manageEntity": {
    "action": "Save",
    "entityId": "272318",
    "entityType": "Track",
    "nonce": "0xb33c076ddf62c350236bfa0a0fae54b63981bc7b10f5c20bfdabed868a999b79",
    "signature": "0xb45a8bc04248ace72fe998e016bab84bf1cb76d15f39cab22e6b057991d81e691a14b520790c86d58d5f067d3e22e7265df8ccfd4fa2e98c7cab51c68717f1e61b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}