{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544515075",
    "entityType": "Track",
    "nonce": "0xd9f2d1f81ffdd72038089937a05362dbc3a62e8b7087b037fb7014e238529cd4",
    "signature": "0x6011381e9f066cd29c382ca481f20281634b462d9c95c39aa6fc3f5399407b197cb95eb51c32b72d37e99f7a182927ebf80cc1e20fd8c0be68a87377cfd59b371c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}