{
  "manageEntity": {
    "action": "Save",
    "entityId": "1338004538",
    "entityType": "Track",
    "nonce": "0xa425f277eba950f469833b3e1fa83fc4b2c3f819446097ade67e6320665e071c",
    "signature": "0x0b154ae9d7913c58c17a917dccc58a54f19a3f8fbd5897f3ed40cc4c3655b1c0166c11fa053aa03f4033d5b1d6924634b9d5debd319d01a2caaf25503dc651431c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}