{
  "manageEntity": {
    "action": "Save",
    "entityId": "947961351",
    "entityType": "Track",
    "nonce": "0x44343bdda804c8109f90077bec8cfb48476f0e50aeee56f6797861a0632208e0",
    "signature": "0x4668db07d5237bf32209e5ad231c02652bb89eb31894965274e96748a0022e02358e3ab8f3ec0d3144e856bf071276116f257ea48e8577e0a3727f88609715611c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}