{
  "manageEntity": {
    "action": "Save",
    "entityId": "1066702170",
    "entityType": "Track",
    "nonce": "0xf3910e4af49c49f069c7bfd78c15901b1a20a2d37c3b2e3d569a1959e73d8d31",
    "signature": "0x2e4825656c8256e040a8bdfdf16e20c13643d9dd763dd8ae37341432120379e32d7f2293e7308681e37e7f3c70d2a93c598e1cb578782f774dae2ac2691742d41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}