{
  "manageEntity": {
    "action": "Save",
    "entityId": "125725495",
    "entityType": "Track",
    "nonce": "0xb58ed163dfaf02c7ebccffee51876bfd866c5ef27cceb49e36a7fe61933709b0",
    "signature": "0xe5f655775a58f867572e21f0dcdad67faa5f10b978047b3bbfbdde27c99e280a3d92d9e09eb504c59a864c9d72053f39accadecea9d7a5e5bb9eb8f791cbc7d41b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}