{
  "manageEntity": {
    "action": "Save",
    "entityId": "1101273262",
    "entityType": "Track",
    "nonce": "0xc271c910d3ac7745ad4167b1678729dbaab9e3790a5b582a1802db727017d535",
    "signature": "0xecb6fb459e68ab2687bcad53c7b91a1457b69aa6bac3e6575e5e19bec8152d912e148e90426d57f054def24afc6749a05120f2e4b0cfedd6e9a851d016bdea401b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}