{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218062653",
    "entityType": "Track",
    "nonce": "0x9651942deeec3f8564ee234623f05a6f88d24df0e4fecda30abc0b6f3210bb38",
    "signature": "0xad98d676c570723e5a1579fb73eba5f4475d2cdecf95d28ac5c94c83c8e73eeb0bf2acd43a9f265ae91206b35f084ba6a29fc46deb38ce6f164d1d05cd15498c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}