{
  "manageEntity": {
    "action": "Save",
    "entityId": "2122024741",
    "entityType": "Track",
    "nonce": "0xa0fedcea9bcdb37af6f85eb59d099283e9d67b88449af261fe1cd4d97c99dba7",
    "signature": "0xe6d7af34637bfa7915c17ac7e4b37485cf6fce12db2348e1059539f3293de8ae1641e360edf5201ab9057761579ce28a1f8d8edc3a42e6f325673c0b7f7320e11b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}