{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497295423",
    "entityType": "Track",
    "nonce": "0xb461a55e009d9299964b8e01ad9dd9eb15f9981ba3b919f2423ff3ceed04f572",
    "signature": "0xe95402bccfad0b050946921526cd84c61c7495ef0e68a1956c9f237024ef0bf83af1c470f1bc3dd7c83541c5ea33c9d7d193a8764f2e1decbf14869b31e0108f1c",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}