{
  "manageEntity": {
    "action": "Save",
    "entityId": "253100150",
    "entityType": "Track",
    "nonce": "0xa5fae8b3b68fbdbc209ae8fefd4eef0d2ae0acacc609ee8b7e75d41af50c28bd",
    "signature": "0xf96690b4b58e97c9b9243b3e1cf9f099f43b78a9e9d9451e67e2bb557e10762a227040a5caa6017a44876c269a0dcbe7026728a65024da3b99d5c95c1769b8931b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}