{
  "manageEntity": {
    "action": "Save",
    "entityId": "126509846",
    "entityType": "Track",
    "nonce": "0xd5d781df102d92930ba3deafdebed94f0956849b42f6b1d84de5a083f9574224",
    "signature": "0x72d5c0c08d76961c9900f3c30aa907cd020f60195bbcddc7c415ee95aff621937213ae1d2f8b690ed7dc954fe3a785d39f5a62fe938192a333a8ebee58dd61781b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}