{
  "manageEntity": {
    "action": "Save",
    "entityId": "58412",
    "entityType": "Track",
    "nonce": "0xc1c944dc8eb355f1f586bf2f3c844bcc511434c2e284908ddc9a45e62ef232b7",
    "signature": "0x94684508b1db16cf8a65cf17b9e5d0d199aa3c7b5e7a33a46938c60faf4b225374a0c05cbf51eabaa14bb63aa6a430ffcfce87b13928d78b8c7630aec92c5c921c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}