{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089260222",
    "entityType": "Track",
    "nonce": "0x3e8dcc0c502694f0203863bbae42e3f5c2f4c552d2a3ad9a813c89a8fc28f576",
    "signature": "0xee4d8583d1d599cf88d9b1d39493d96756c7348c1a616c3b463da79c65d3a6207c0f22ab06138b0504e8d13d69053b8c5f798365d4abda96edd2d17a2c5ebb2e1b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}