{
  "manageEntity": {
    "action": "Save",
    "entityId": "53938335",
    "entityType": "Track",
    "nonce": "0x30aa30e4cb376806e57a3b0264a66ab2d0a3181f2154af6900c55775bd7afde3",
    "signature": "0xd378b7408e838bd402f944eef28b4158889bda3b96dfcefa441d6ac6412fa952255b570d249c6619226cbe7d53f6636008bb5b8c88d6d25689ae36980da9c9351c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}