{
  "manageEntity": {
    "action": "Save",
    "entityId": "746877501",
    "entityType": "Track",
    "nonce": "0x2dd7158de28d59f4df7501a6f67271067e75ec914b75d1b384884f850db08b49",
    "signature": "0x9103c72a6625c062349d31d806722ca35173800aa6141be2dc6d85df4755236c3a5dd6f2e8e6be4c3d015ab544e28dff7f059852fa94c683d54b7424c8ee9a411b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}