{
  "manageEntity": {
    "action": "Save",
    "entityId": "1006581",
    "entityType": "Track",
    "nonce": "0xd71e65288678f7805bc2841d8f52ae0a5b805e6fc8754392b4b38979db184b2e",
    "signature": "0xda86c4270b55d2bf1ebfb309cb061c815579a3e93c76bd8476065058b4c192ae450133d10c0d7f11f14388ee6de4675f9f3df734d56f23ffee38046a59c739751c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}