{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116209291",
    "entityType": "Track",
    "nonce": "0x4baafe3796688248abf93d973ed5e22417dd8561618ce6978dcd788b17a13839",
    "signature": "0xbb19df6665975a6c67312a6f7c321c81575942a63a0dadbabc272381b2a0a1b16b8dda5188c5297963497a3d0cb5f9b23266f8e3a1f79f0861314074c18feb5d1b",
    "signer": "0x65E206f484415ee5E20E9B8da531F689983C6e36",
    "userId": "718637748"
  }
}