{
  "manageEntity": {
    "action": "Save",
    "entityId": "2143322865",
    "entityType": "Track",
    "nonce": "0x2a0bceb364de842eb14bb0478184b7bcbe6fcc3c68fbfe83f05db1df01f98848",
    "signature": "0xa10b1a43db6b5a0cd7d0d25dbec4003b5a0f046501b6827c46a94f9725e59d030caec9697671db7c0c6212fc83781166e559155c39ed6aa0b055527005d51d0f1b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}