{
  "manageEntity": {
    "action": "Save",
    "entityId": "73505877",
    "entityType": "Track",
    "nonce": "0x3cd0e0540c4c0ca0590067b77ce6fc446d9ab33e233462e408f3d744c764d97f",
    "signature": "0x3e03bebbcae64a0e95681e3f9d81f2496bf944af038beffb1d2397a3a0f82901248918a2d2e8a015fae6a7421ba2372f5e627c68941dd9b9840ac2b172909f1a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}