{
  "manageEntity": {
    "action": "Save",
    "entityId": "476692237",
    "entityType": "Track",
    "nonce": "0x6cab3b3cb8cffadc3477ac2d9b4f2b9f4f7835e35efba5a8027dd120ee1fd0cc",
    "signature": "0xf25612391c665757b60e70f9aac801f282f35bacc5f6bad4c0544160b7013ee4257d26352c95d840f3d8858f02687ee53ba3941385222046a924602f6406c8ae1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}