{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087791170",
    "entityType": "Track",
    "nonce": "0x8299c5bda3ce560796a35d8a0ab51ff066d90829f7ced54ce9046f5900d530ba",
    "signature": "0x5238d6412d53bd2f3f43c521e92b49ef260482c2f158a20ffc3a0b51dff91762794150908224fe6fff3f7b09f5159cc5416f906f86bd47b64173481cd2d343441c",
    "signer": "0x5cd3eA7DcAA86960596227F4c8624063F3B8893D",
    "userId": "215993"
  }
}