{
  "manageEntity": {
    "action": "Save",
    "entityId": "730969771",
    "entityType": "Track",
    "nonce": "0x87683e77a337362f4073928a512a295671e2d8825eb496d31eba69a35731c328",
    "signature": "0xfd50855192b53e1673f1dd1dfb3e0f8f9f7030eab9a1f796e22c691e352a3d3b7f44913c1c2d212656460fef39d9454688a74ea9d89f39264d799c24ebccf3f91c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}