{
  "manageEntity": {
    "action": "Save",
    "entityId": "1186574429",
    "entityType": "Track",
    "nonce": "0x8e51eb486e158525018f8a83bb8da11c6a69ff06a85e44a611ecc10fd716a801",
    "signature": "0x97959076fde6feca17476c0f2e89b32349f36925342da23160c1c4765a99063149e0e161347cfb6890f75130dab9bd8a39d0d004e9821d4bc4e7ff899990addd1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}