{
  "manageEntity": {
    "action": "Save",
    "entityId": "104319211",
    "entityType": "Track",
    "nonce": "0x309d44dee4c12bb4ad1110de62dc077d76d0da3a7e69739ede79ffefed4cc8f7",
    "signature": "0xca01611b9818c1153e4c7692d3406abbd43388bdb09c1df3ae6f6d03d8655eb839d3650a099403f81414a1f8102d18e16e08bf5d61eca75d12ea90bd6f8624911b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}