{
  "manageEntity": {
    "action": "Save",
    "entityId": "1360356243",
    "entityType": "Track",
    "nonce": "0x7a5d72e5ae1b9b7e3351325446768c0b8759639512aba6a957f0bf4e9165a908",
    "signature": "0xd7aa459521f125c259f68b2987a4d49f701d0b7dc928ac8e6580675f407221fb7ca4d723c9303df45787b99fa9ecb9fd2bdc065d0209b0d8828033d4db0dbbf71c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}