{
  "manageEntity": {
    "action": "Save",
    "entityId": "1207000386",
    "entityType": "Track",
    "nonce": "1788581637774956720",
    "signature": "0x90538481293e5ace32b6bb98b2a4784c1249b7887f4504dd973e52fa57779b1b7c146d0cbdca284feb5675a8ef850194123667637446c03a615ffa36578c82f81c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}