{
  "manageEntity": {
    "action": "Save",
    "entityId": "1157062520",
    "entityType": "Track",
    "nonce": "0xbafd6b41946113c1034b5cdb99f96e4920ca38a28f379318f220a7e72ddb954c",
    "signature": "0x144e4db3f3bf9063b33d6a9412dd9a7befc15dc2f8dfe988da87d3d60400887a68b1b11639f7abefb902ebb423e7562dc48a3a44300393ec3e2be5b6a770b7e31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}