{
  "manageEntity": {
    "action": "Save",
    "entityId": "2043376146",
    "entityType": "Track",
    "nonce": "0xcb5c8c78c1a903720a45da180fcb8c443df9f15dcfe310d7b7d120d836a52fe1",
    "signature": "0x7266f16b19e3c5aef57241b97b64741c7d37cd06e0009fb3c70abb87277e937c65c53344598a25cefdf4532bf44918aed504d4575d79c84beb1b03f4b98bb0ac1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}