{
  "manageEntity": {
    "action": "Save",
    "entityId": "616266",
    "entityType": "Track",
    "nonce": "0x71410598cea8c627edd8b60a81a4525b721811955017290809c266055557d30e",
    "signature": "0x5f32ea7bd62db302a4e8a8a9c8a687656ced606f5280da574f7de372d102c1831a9ccdf3bb8e579cdb2587e0407d78a07b77c31b0b3231372bc887e2714276691b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}