{
  "manageEntity": {
    "action": "Save",
    "entityId": "369793889",
    "entityType": "Track",
    "nonce": "0xfbc2a5d6712ff85cf58cb90cb8aed8648ea44286331525e417ae28e9f4bc98f5",
    "signature": "0xe4f6a5104332cab42f3110e90a6e05a16b378284716d49ecf91b22b7c120d7295fd211059eabc03dc853eec5fc78cd9bb92abe895e5e1edb5cf477dbb8b2010e1c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}