{
  "manageEntity": {
    "action": "Save",
    "entityId": "1551240630",
    "entityType": "Track",
    "nonce": "0xb0062fc744b0364a5de6509646cd250e7f80bff81483293236857b261038bc7b",
    "signature": "0x9dc52e3edc31304af7562dce84a4993dc622856ee2a2dd2bed112445b6afe1f21732dc5872b35184f676399410e15ec4a08f610096dd990b857e56ce023fdcd31b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}