{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677070579",
    "entityType": "Track",
    "nonce": "0x3b8f0e277e09e82e938503690ed408e89c567989257b0e4f4613c2d66cf3aaa1",
    "signature": "0x755a4e5f718e5656feafab5f3e3903bc62cd2575694cc521b855ecd501bf167c1e7b6d232e992661c0d747e60f9cc4040595855f5e4d86e86fdb471e60aa4f851b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}