{
  "manageEntity": {
    "action": "Save",
    "entityId": "942392870",
    "entityType": "Track",
    "nonce": "0x488ef8b7b9887c784d82e349d4b3e920b908996864fcd1367c2cc2388dfc3160",
    "signature": "0x08e5686ebca47f34d6707786142dc064ea8d26cafece442f7814f1dc8c35f33d6f99642bd1695e8f37542ae6fc6b296ee56cf2a8aa6d3e964906cf806daccf851b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}