{
  "manageEntity": {
    "action": "Save",
    "entityId": "614203",
    "entityType": "Track",
    "nonce": "0x064122c071c4e13c2909d9c9a5752e67c9b0be4e16704282af363739ee0ddbd3",
    "signature": "0xd46b7d1c6c0a1c49fc374b0f7b3fa52cd22f03ba3af6214e09c21436ad0be04115507446af14db6aa289f6e4033ba617844b4e2c22b0268a3738bb9c870affaf1b",
    "signer": "0x5E1b23614a9da638dba09e8aB2E9B76ed81c688f",
    "userId": "306948669"
  }
}