{
  "manageEntity": {
    "action": "Save",
    "entityId": "476331993",
    "entityType": "Track",
    "nonce": "0x7bd22aea1db47094a416a85344592853748fcb88ff4f25a9d231d8ac37ef17fc",
    "signature": "0xc78507fd07af6df1945bdef45ec5cf5a01a509995e0a0f9b00edd731f306b82923e4b44a248af28bc6e67068f866bfdea96e050602611f967e65166725cab8e31c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}