{
  "manageEntity": {
    "action": "Save",
    "entityId": "1909317115",
    "entityType": "Track",
    "nonce": "0x6ec2c05642876d40b714c4dc0a0bf91dbf39f42855fda850c01a73185756f0d0",
    "signature": "0x2bdb005373a7d1b722e67c7306bf4a770afd7faeaa4fea28da7b63bf44b2e5324dad4288787bd5f9d8db066ca3f54d45cb7b3e70661ec80c9a90d5ac86c4376b1b",
    "signer": "0xbf1f8021D15fDffe83FE44dA0b0c9CE22371359e",
    "userId": "276678878"
  }
}