{
  "manageEntity": {
    "action": "Save",
    "entityId": "2012528914",
    "entityType": "Track",
    "nonce": "0x86ae6b2f8b26e57d8d52faff2f55ef3f82978a6ad995bcd8200bba2940b7ffc6",
    "signature": "0x19d0e8b7f13e3d686c72360682acc9c90a33bdcf70af810ed70d1d85ed13c17c4ff2bf4943dc76681df1bbfc22cc1dbe21d4c81df40e0555f2fdd38120b4ab5f1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}