{
  "manageEntity": {
    "action": "Save",
    "entityId": "1306964621",
    "entityType": "Track",
    "nonce": "0x7907acea160d37800e900d9b740a66d6204174d0bea33cc031c3dcafb297b29d",
    "signature": "0xab51fb9a8a3b4b0b34f47ffb2724d291945722f66085009798b1e92ac2c62df512dd0c1c2062bffaf95a892087ca76bb691f3de586f5f7676c5d02f0f820cdf51c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}