{
  "manageEntity": {
    "action": "Save",
    "entityId": "632148150",
    "entityType": "Track",
    "nonce": "0xe5a1213ea2cff323313a29bbdf97267eb1a3e45df3fac84229864b84a0d08395",
    "signature": "0x82789d327041333a2dcfb0829b67bb21f1b1847f5c58cae5436f331d45c5ced706077e275f6f28934231c1bc1bcfd46ca30c2771f2e09ec5af2d513874a9f3fd1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}